Hi,
Assuming this is a business expenses, according to the CRA you can claim GST/HST on your business expenses which includes motor vehicle expenses.
http://www.cra-arc.gc.ca/tx/bsnss/tpcs/slprtnr/bsnssxpnss/menu-eng.html
Here is additional information if you're leasing:
http://www.cra-arc.gc.ca/tx/bsnss/tpcs/slprtnr/bsnssxpnss/mtr/ddctbl/ls-eng.html